All-angle optical switch based on the zero reflection effect of graphene–dielectric hyperbolic metamaterials

论文摘要

We have studied a switchable hyperbolic metamaterial composed of a graphene–dielectric periodic structure.By tuning the chemical potential of all graphene sheets simultaneously, the isofrequency curve can switch between an ellipse and a hyperbola conveniently. In particular, a special hyperbolic isofrequency curve with its asymptote perpendicular to the interface is obtained and used to realize the zero reflection effect. Furthermore, a zeroreflection-based optical switch working in the terahertz spectrum is demonstrated. Its bandwidth can be efficiently adjusted by geometric parameters such as permittivity and period. Such an optical switch possesses the merits of low loss, high transmittance contrast, high response speed, compact size, high tolerance of chemical potential, and having all incident angles（0°–90°） simultaneously. Such an optical switch holds great potential in many fields,such as data storage, beam steering, and integrated photonic circuits.

论文目录

文章来源

类型: 期刊论文

作者: WENYAO LIANG,ZHENG LI,YU WANG,WUHE CHEN,ZHIYUAN LI

来源: Photonics Research 2019年03期

年度: 2019

分类: 基础科学,工程科技Ⅰ辑

专业: 材料科学

单位: School of Physics and Optoelectronics, South China University of Technology,School of Electronic and Information Engineering, South China University of Technology

基金: National Natural Science Foundation of China(NSFC)(11504114,11434017),National Key R&D Program of China(2018YFA 0306200),Science and Technology Program of Guangzhou,China,SRP of South China University of Technology

分类号: TB34

页码: 318-324

总页数: 7

文件大小: 782K

下载量: 21

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